کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8001145 | 1516278 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of photoluminescence properties and thermal stability of Y2.9Ce0.1Al5âxSixO12 phosphors with Si3N4 addition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A series of Si3N4 doping Y2.9Ce0.1Al5âxSixO12â3x/2N4x/3 phosphors were prepared by solid-state reaction in 95%N2-5%H2 reduced air ambience. The XRD characteristics plus Rietveld refinement results shows that the as-sintered powders are unique crystal phase with the same crystal structure of Y3Al5O12 (PDF No. 79-1891). The N element was not detected by the analysis of X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectrum (EDS). The photoluminescence spectra (PL & PLE) tests show that the exciting and emitting intensity of PLE & PL gradually increase due to the increase of Si3N4 concentration. Meanwhile, the phosphorescence decay times are prolonged from 45 ns (x = 0) to 78 ns (x = 0.3), under the monitor of 530 nm wavelength. The thermoluminescence tests (TL) confirm the thermal stability of as-phosphors with Si3N4 addition is much better than that of the pristine Y2.9Ce0.1Al5O12 phosphors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 615, 5 December 2014, Pages 588-593
Journal: Journal of Alloys and Compounds - Volume 615, 5 December 2014, Pages 588-593
نویسندگان
Fangfang Zhang, Kaixin Song, Jun Jiang, Song Wu, Peng Zheng, Qingming Huang, Junming Xu, Huibin Qin,